package org.goyo.main.services.security;

import java.util.Collection;
import java.util.Iterator;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.goyo.main.domain.entity.system.SysUser;
import org.goyo.main.web.controller.system.SessionUtil;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.transaction.annotation.Transactional;
@Transactional
public class AccessDecisionManager implements org.springframework.security.access.AccessDecisionManager {
	Log logger = LogFactory.getLog(this.getClass());
	
	public void decide(Authentication authentication, Object object,
			Collection<ConfigAttribute> configAttributes)
			throws AccessDeniedException, InsufficientAuthenticationException {
		  Object obj = SessionUtil.getAttribute("user");
		  if(obj != null){
			  SysUser user = (SysUser)obj;
			  if(user.isSupper()){
				  return;
			  }
		  }
		
		if (configAttributes == null) {
			logger.info("configAttributes is null");
			return;
		}
		// 所请求的资源拥有的权限(一个资源对多个权限)
		Iterator<ConfigAttribute> iterator = configAttributes.iterator();
		if(!iterator.hasNext()){
			throw new AccessDeniedException("没有权限访问！");
		}
		while (iterator.hasNext()) {
			ConfigAttribute configAttribute = iterator.next();
			// 访问所请求资源所需要的权限
			String needPermission = configAttribute.getAttribute();
			logger.info("needPermission is " + needPermission);
			// 用户所拥有的权限authentication
			for (GrantedAuthority ga : authentication.getAuthorities()) {
				if (needPermission.equals(ga.getAuthority())) {
					return;
				}
			}
		}
		// 没有权限
		throw new AccessDeniedException("没有权限访问！");
	}

	public boolean supports(ConfigAttribute attribute) {
		return true;
	}

	public boolean supports(Class<?> clazz) {
		return true;
	}

}
